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Efficient α-CsPbI3 Photovoltaics with Surface Terminated Organic Cations
Joule ( IF 38.6 ) Pub Date : 2018-07-06 , DOI: 10.1016/j.joule.2018.06.013
Yong Wang , Taiyang Zhang , Miao Kan , Yihui Li , Tian Wang , Yixin Zhao

Quasi-2D or 2D capping is an effective strategy to stabilize organic-inorganic metal halide perovskite materials, often at a detriment to electronic transport. Due to an efficient cation exchange between organic constituents, the location and thickness of reduced-dimensional hybrid perovskite layers is difficult to control. We find that the all-inorganic CsPbI3 perovskite cannot go through either solid state or sequential cation exchange to form a 2D perovskite capping layer. Instead, a defect-passivating organic cation terminated surface is formed that improves phase stability and moisture resistance. The corresponding α-CsPbI3 perovskite solar cells exhibit high reproducibility with a champion stabilized efficiency of 13.5%. This work shows that the high cation exchange resistance of CsPbI3 perovskites can be exploited to promote the development of highly efficient and stable perovskite photovoltaics.



中文翻译:

高效α-CsPbI 3光伏与表面终止有机阳离子

准2D或2D封盖是稳定有机-无机金属卤化物钙钛矿材料的有效策略,通常不利于电子传输。由于有机成分之间的有效阳离子交换,降维杂化钙钛矿层的位置和厚度很难控制。我们发现,全无机CsPbI 3钙钛矿不能通过固态或顺序阳离子交换形成2D钙钛矿覆盖层。而是形成了一种缺陷钝化的有机阳离子封端表面,该表面改善了相稳定性和耐湿性。相应的α-CsPbI 3钙钛矿太阳能电池显示出高再现性,冠军稳定效率达13.5%。这项工作表明,可以利用CsPbI 3钙钛矿的高阳离子交换电阻来促进高效,稳定的钙钛矿光伏电池的开发。

更新日期:2018-07-06
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